Which Pokemon should I use for a Pokemon battle

[Blackbird]

I'm going to enter an Wi-Fi battle, and I'm unsure of which 6 pokemon I should use.


Typhlosion lv67+ Eruption-Focus Punch-Ember
Lugia Lv.51+ Extrasensory-Dragon Pulse-Hydro Pump-Aeroblast
Meloetta (Both forms) Lv50+ Round-Teeter Dance-Relic Song-Close Combat
Fraxure/Haxorus Lv.46+ False Swipe-Dragon Pulse-Dragon Dance-Aerial Ace
Floatzel Lv42+ Swift-Aqua Jet-Surf-Whirlpool
Seviper Lv49+ Poison Fang-Bulldoze-X-Scizzor-Night Slash
Sawsbuck Lv.60+ Cut-Horn Leech-Nature Power-Solarbeam
Terrakion Lv45+ Helping Hand-Retaliate-Rock Slide-Sacred Sword
Suicune Lv47+ Air Slash-ExtremeSpeed-Surf-Scald